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FILE - In this March 21, 2013 file photo, South Korean computer researchers, left, check the computer servers of Korean Broadcasting System (KBS) as a South Korean police officer from Digital Forensic Investigation watches at the Cyber Terror Response Center at the National Police Agency in Seoul, South Korea. Investigators have yet to pinpoint the culprit behind a synchronized cyberattack in South Korea last week. But in Seoul, the focus remains fixed on North Korea, where South Korean security
/ AP